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Mo1575 The Characteristics of Colorectal Tumors in the Fecal Occult Blood Test-Positive Group and Negative Group of Asymptomatic Examinees
Abstracts
Patients
Presence of adenoma
BMI < 30 n (%)
BMI > 30 n (%)
P value
yes no yes no
14 (15.9) 74 (84.1) 32 (15.0) 181 (85.0)
7 (30.4) 16 (69.6) 5 (12.5) 35 (87.5)
0.10
Male patients Female patients
0.68
The Chi-square test or Fisher exact test
Mo1573 Prevalence of Polyps, Adenomas, Advanced Lesions and Adenocarcinoma in 45 to 49 Year- Old Patients Luis E. Caro1, Liliana M. Correa*1, Sandra Canseco1, Carolina Bolino1,2, Cecilio L. Cerisoli1 1 Gedyt, Buenos Aires, Argentina; 2Gastroenterology Hospital Dr Carlos Bonorino Udaondo, Buenos Aires, Argentina Introduction: Colon rectal cancer (CRC) can be prevented and cured if it is early diagnosed. Colonoscopy is the first-line procedure for screening CRC in average risk population. In 2002, Imperiale and collaborators reported that adenomas and advanced adenomas presented in 8.5% and 3.5%, respectively, among persons 40 to 49 years of age. At this moment no recommendations for CRC screening in this population have been made. Objective: To estimate the prevalence of polyps, adenomas, advanced lesions and adenocarcinoma in 45 to 49 year- old patients. Materials and Methods: We included consecutive adults between the ages 45 and 49 years who performed colonoscopy because of gastrointestinal signs or symptoms. We excluded patients at high risk for CRC, incomplete procedures and/ or evidence of colonic tumor diagnosed by other methods. The study was conducted in a gastroenterology and endoscopy ambulatory center in Buenos Aires, Argentina, between September 2010 and October 2011. Design: Descriptive, prospective and cross sectional study. Interventions: Polyethylene glycol (PEG) lavage solution or phosphates, with or without bisacodyl were used for bowel preparation. Colonoscopies were performed under sedation with Olympus 160/180 series equipment. Biopsies were evaluated by pathologists specialized in gastroenterology. Indication for colonoscopy was registered. The protocol was approved by local IRB. Statistical analysis: VCCstat 2.0. 95% CI were estimated. Results: 814 patients were evaluated. 764 were included. 57% (440/764) were women; average age was 47 years.1.a) The global prevalence of polyps was 160/764 (20%; 95 CI 18-24); 71/440 (16%; 95 CI 13-20) in women and 89/324 (27%; 95 CI 22-32) in men. 1.b) The global prevalence of adenomas was 107/764 (14%; 95 CI 11-16%), 59/324 (18%; 95 CI 14-22) in men and 48/440 (11%; 95 CI 8-14) in women; 1.c) The global prevalence of advanced adenomas was 39/764 (5%;95 CI 4-7) and of adenocarcinoma was 2/764 (0.1%; 95 CI 0-0, 7). The most common indications for colonoscopy were proctorrhagia, abdominal pain and altered bowel habits. Conclusions: The prevalence of lesions in this population is lower than average risk population and it is similar to the information reported internationally. At the moment we do understand that there is no evidence to indicate CRC screening in 45 to 49 individuals . Research on metabolic and epidemiological factors are needed to evaluate the biological behavior of CRC in young individuals.
Mo1574 Increased Risk of Colonic Neoplasia in Patients With Sporadic Duodenal Adenomas Lisandro Pereyra*1, Raquel GonzáLez1, Pablo Luna1, GASTóN Babot Eraña1, Estanislao J. GóMez1, Guillermo N. Panigadi1, Carolina Fischer1, Juan S. Lasa2, Luis O. Soifer2, Silvia C. Pedreira1, Daniel G. Cimmino1, Luis A. Boerr1 1 Gastroenterology and Gastrointestinal Endoscopy, Hospital Alemán, Buenos Aires, Argentina; 2Gastroenterology, Hospital CEMIC, Buenos Aires, Argentina Introduction: although colorectal neoplasia is recognized to occur more frequently in patients with familial adenomatous polyposis (FAP), association with sporadic duodenal adenomas (SDA) has not been clearly established. Aim: To determine the risk of colorectal neoplasia among patients with sporadic duodenal adenomas. Materials and Methods: A nested case-control study was conducted using the Gastroenterology and Endoscopy electronic data bases of two community hospitals to identify patients who underwent upper GI endoscopy and colonoscopy during a 7 year-period. Patients with SDA were regarded as “cases” and those without SDA were regarded as “controls”. A survey was carried out by telephone calls to assess colorectal cancer risk factors. For each case, two controls matched for age, sex and first and second grade family history of colorectal cancer (CRC), were randomly selected. The main outcome evaluated was the risk of colorectal adenomas, advanced neoplastic lesions (ANL) and cancer. Risk was expressed in odds ratio (OR) with its corresponding 95% confidence intervals (CI). Results: In this period 34 patients with SDA met the above mentioned criteria and were included as cases and 68 as controls. There was no statistical significant difference between both groups
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with respect to: age, gender, colorectal cancer family history and main indication for colonoscopy (p⬎0, 05). Most adenomas were located in the second portion of the duodenum 20/34 (58%). Mean size was 8 mm (range 5-20mm). High grade dysplasia was reported in 4/34 (12%).Colonoscopy showed at least one adenoma in 16/34 (47%) cases and in 17/68 (25%) controls (p 0,04 OR 2,66 CI 1,02-2,98), ANL in 8/34 (23%) cases and in 5/68 (7%) controls (p 0,04 OR 3,87 CI 1,01-15,4) and colorectal adenocarcinoma in 2/34 (6%) cases and 2/68 (2%) controls (p 0,76 OR 2,34 CI 0,22-24,6). Conclusion: In this case control study, the prevalence of colorectal neoplasia in patients with sporadic duodenal adenomas without FAP was higher than the average control population. This may have important implications in colorectal cancer screening.
Mo1575 The Characteristics of Colorectal Tumors in the Fecal Occult Blood Test-Positive Group and Negative Group of Asymptomatic Examinees Kunihiko Wakamura*, Shin-Ei Kudo, Hideyuki Miyachi, Daisuke Watanabe, Kenta Kodama, Seiko Hayashi, Naoya Toyoshima, Hiromasa Oikawa, Makoto Kutsukawa, Kosuke Sudo, Masashi Misawa, Yuichi Mori, Toyoki Kudo, Noriyuki Ogata, Tomokazu Hisayuki, Yoshiki Wada, Takemasa Hayashi, Fuyuhiko Yamamura Digestive Disease Center, Showa University Northern Yokohama Hospital, Yokohama, Japan Introduction: In Japan, the colorectal cancer morbidity has been increasing year by year. Therefore, screening examination is essential for early detection of the colorectal cancer (CRC). Fecal occult blood test (FOBT) is a simple, low cost, non-invasive method. Furthermore, there has been firm experimental evidence that FOBT reduces the risk or CRC mortality. Therefore, FOBT is recommended as a population-based CRC screening in Japan. On the other hand, screening colonoscopy is considered as opportunistic screening based on a balance between benefits and disadvantages in spite of high-accuracy method. Moreover, it is a controversial problem that some of CRCs are negative for FOBT. Aim: This study was designed to examine precision of FOBT in asymptomatic examinees of opportunistic screening in our hospital. Method: From December 2001 to August 2012, 1-day immunochemical FOBT (iFOBT) was performed in a total of 11044 subclinical examinees in the health screening program of our hospital. A total of 2274 subjects of them underwent colonoscopy (CS) after iFOBT. We divided the subjects into two groups (iFOBT-positive group: iFOBT (⫹) group, iFOBT-negative group: iFOBT (⫺) group), and compared the characteristics of CS within two years after iFOBT between the both groups. Result: Of a total of 2274 examinees, 645 underwent CS within two years after iFOBT. Among them, 256 were in the iFOBT (⫹) group, while 399 were in the iFOBT (⫺) group. Significant differences were not admitted in the age and gender between the both groups. Of the 256 iFOBT (⫹) examinees, 47 showed advanced neoplasia (tubular adenoma ⭌10 mm, adenoma with villous histology, or high-grade dysplasia or invasive cancer) while 23 showed advanced neoplasia of the 399 iFOBT (⫺) examinees. The prevalence rate of advanced neoplasia was higher in iFOBT (⫹) group than that in the iFOBT (⫺) (24.2% vs. 7.27%: P⬍0.001). The number of advanced neoplasia was 62 in the iFOBT (⫹) group, while 29 in the iFOBT (⫺) group, respectively. The average tumor size (including adenoma⭌ 10mm) in iFOBT (⫹) group was significantly larger than that in the iFOBT (⫺) group (5.75⫾ 6.46 mm vs. 4.24⫾2.96 mm: P⬍0.001). The rate of proximal-sided advanced neoplasia showed no significant differences between the both groups (30.6% vs. 48.3%: P⬎0.05). As for invasion depth of CRC, all of FOBT (⫺) CRCs were Tis while 37.9% of the FOBT-positive CRCs were T1 or deeper (P⬎0.05). In the morphology of early colorectal carcinomas (Tis or T1), there were no significant differences between the both groups. Conclusion: As for screening of advanced neoplasia in the colorectum, iFOBT was an excellent examination. But the small tumors might be overlooked by iFOBT. Regardless of iFOBT, CS for asymptomatic examinees might enable us to detect colorectal tumors in a curable state with endoscopic the treatment.
Mo1576 The Efficiency of Colonic Capsule Endoscopy in Detection of Colorectal Polyps and Cancers Comparing to Colonoscopy: Multicenter, Prospective Crosses Over Study Stepan Suchanek*1, Michal Voska1, Ondrej Majek2, Gabriela Vojtechova1, Ilja Tacheci3, Marek Benes4,5, Pavel Drastich4,5, Tomáš Douda3, Jan Martinek1,4, Jan Bures3, Julius Spicak4, Miroslav Zavoral1 1 Department of Gastroenterology, 1st Faculty of Medicine, Charles University, Military University Hospital, Prague, Czech Republic; 2Institute of Biostatistics and Analyses, Masaryk University, Brno, Czech Republic; 3 Department of Gastroenterology, Faculty of Medicine, University Hospital, Hradec Kralove, Czech Republic; 4Department of Hepatogastroenterology, Institute for Clinical and Experimental Medicine, Prague, Czech Republic; 5 GEP Clinic, Prague, Czech Republic Background: Colon capsule endoscopy represents a noninvasive technology that
Volume 77, No. 5S : 2013
GASTROINTESTINAL ENDOSCOPY
AB433
Patients
Presence of adenoma
BMI < 30 n (%)
BMI > 30 n (%)
P value
yes no yes no
14 (15.9) 74 (84.1) 32 (15.0) 181 (85.0)
7 (30.4) 16 (69.6) 5 (12.5) 35 (87.5)
0.10
Male patients Female patients
0.68
The Chi-square test or Fisher exact test
Mo1573 Prevalence of Polyps, Adenomas, Advanced Lesions and Adenocarcinoma in 45 to 49 Year- Old Patients Luis E. Caro1, Liliana M. Correa*1, Sandra Canseco1, Carolina Bolino1,2, Cecilio L. Cerisoli1 1 Gedyt, Buenos Aires, Argentina; 2Gastroenterology Hospital Dr Carlos Bonorino Udaondo, Buenos Aires, Argentina Introduction: Colon rectal cancer (CRC) can be prevented and cured if it is early diagnosed. Colonoscopy is the first-line procedure for screening CRC in average risk population. In 2002, Imperiale and collaborators reported that adenomas and advanced adenomas presented in 8.5% and 3.5%, respectively, among persons 40 to 49 years of age. At this moment no recommendations for CRC screening in this population have been made. Objective: To estimate the prevalence of polyps, adenomas, advanced lesions and adenocarcinoma in 45 to 49 year- old patients. Materials and Methods: We included consecutive adults between the ages 45 and 49 years who performed colonoscopy because of gastrointestinal signs or symptoms. We excluded patients at high risk for CRC, incomplete procedures and/ or evidence of colonic tumor diagnosed by other methods. The study was conducted in a gastroenterology and endoscopy ambulatory center in Buenos Aires, Argentina, between September 2010 and October 2011. Design: Descriptive, prospective and cross sectional study. Interventions: Polyethylene glycol (PEG) lavage solution or phosphates, with or without bisacodyl were used for bowel preparation. Colonoscopies were performed under sedation with Olympus 160/180 series equipment. Biopsies were evaluated by pathologists specialized in gastroenterology. Indication for colonoscopy was registered. The protocol was approved by local IRB. Statistical analysis: VCCstat 2.0. 95% CI were estimated. Results: 814 patients were evaluated. 764 were included. 57% (440/764) were women; average age was 47 years.1.a) The global prevalence of polyps was 160/764 (20%; 95 CI 18-24); 71/440 (16%; 95 CI 13-20) in women and 89/324 (27%; 95 CI 22-32) in men. 1.b) The global prevalence of adenomas was 107/764 (14%; 95 CI 11-16%), 59/324 (18%; 95 CI 14-22) in men and 48/440 (11%; 95 CI 8-14) in women; 1.c) The global prevalence of advanced adenomas was 39/764 (5%;95 CI 4-7) and of adenocarcinoma was 2/764 (0.1%; 95 CI 0-0, 7). The most common indications for colonoscopy were proctorrhagia, abdominal pain and altered bowel habits. Conclusions: The prevalence of lesions in this population is lower than average risk population and it is similar to the information reported internationally. At the moment we do understand that there is no evidence to indicate CRC screening in 45 to 49 individuals . Research on metabolic and epidemiological factors are needed to evaluate the biological behavior of CRC in young individuals.
Mo1574 Increased Risk of Colonic Neoplasia in Patients With Sporadic Duodenal Adenomas Lisandro Pereyra*1, Raquel GonzáLez1, Pablo Luna1, GASTóN Babot Eraña1, Estanislao J. GóMez1, Guillermo N. Panigadi1, Carolina Fischer1, Juan S. Lasa2, Luis O. Soifer2, Silvia C. Pedreira1, Daniel G. Cimmino1, Luis A. Boerr1 1 Gastroenterology and Gastrointestinal Endoscopy, Hospital Alemán, Buenos Aires, Argentina; 2Gastroenterology, Hospital CEMIC, Buenos Aires, Argentina Introduction: although colorectal neoplasia is recognized to occur more frequently in patients with familial adenomatous polyposis (FAP), association with sporadic duodenal adenomas (SDA) has not been clearly established. Aim: To determine the risk of colorectal neoplasia among patients with sporadic duodenal adenomas. Materials and Methods: A nested case-control study was conducted using the Gastroenterology and Endoscopy electronic data bases of two community hospitals to identify patients who underwent upper GI endoscopy and colonoscopy during a 7 year-period. Patients with SDA were regarded as “cases” and those without SDA were regarded as “controls”. A survey was carried out by telephone calls to assess colorectal cancer risk factors. For each case, two controls matched for age, sex and first and second grade family history of colorectal cancer (CRC), were randomly selected. The main outcome evaluated was the risk of colorectal adenomas, advanced neoplastic lesions (ANL) and cancer. Risk was expressed in odds ratio (OR) with its corresponding 95% confidence intervals (CI). Results: In this period 34 patients with SDA met the above mentioned criteria and were included as cases and 68 as controls. There was no statistical significant difference between both groups
www.giejournal.org
with respect to: age, gender, colorectal cancer family history and main indication for colonoscopy (p⬎0, 05). Most adenomas were located in the second portion of the duodenum 20/34 (58%). Mean size was 8 mm (range 5-20mm). High grade dysplasia was reported in 4/34 (12%).Colonoscopy showed at least one adenoma in 16/34 (47%) cases and in 17/68 (25%) controls (p 0,04 OR 2,66 CI 1,02-2,98), ANL in 8/34 (23%) cases and in 5/68 (7%) controls (p 0,04 OR 3,87 CI 1,01-15,4) and colorectal adenocarcinoma in 2/34 (6%) cases and 2/68 (2%) controls (p 0,76 OR 2,34 CI 0,22-24,6). Conclusion: In this case control study, the prevalence of colorectal neoplasia in patients with sporadic duodenal adenomas without FAP was higher than the average control population. This may have important implications in colorectal cancer screening.
Mo1575 The Characteristics of Colorectal Tumors in the Fecal Occult Blood Test-Positive Group and Negative Group of Asymptomatic Examinees Kunihiko Wakamura*, Shin-Ei Kudo, Hideyuki Miyachi, Daisuke Watanabe, Kenta Kodama, Seiko Hayashi, Naoya Toyoshima, Hiromasa Oikawa, Makoto Kutsukawa, Kosuke Sudo, Masashi Misawa, Yuichi Mori, Toyoki Kudo, Noriyuki Ogata, Tomokazu Hisayuki, Yoshiki Wada, Takemasa Hayashi, Fuyuhiko Yamamura Digestive Disease Center, Showa University Northern Yokohama Hospital, Yokohama, Japan Introduction: In Japan, the colorectal cancer morbidity has been increasing year by year. Therefore, screening examination is essential for early detection of the colorectal cancer (CRC). Fecal occult blood test (FOBT) is a simple, low cost, non-invasive method. Furthermore, there has been firm experimental evidence that FOBT reduces the risk or CRC mortality. Therefore, FOBT is recommended as a population-based CRC screening in Japan. On the other hand, screening colonoscopy is considered as opportunistic screening based on a balance between benefits and disadvantages in spite of high-accuracy method. Moreover, it is a controversial problem that some of CRCs are negative for FOBT. Aim: This study was designed to examine precision of FOBT in asymptomatic examinees of opportunistic screening in our hospital. Method: From December 2001 to August 2012, 1-day immunochemical FOBT (iFOBT) was performed in a total of 11044 subclinical examinees in the health screening program of our hospital. A total of 2274 subjects of them underwent colonoscopy (CS) after iFOBT. We divided the subjects into two groups (iFOBT-positive group: iFOBT (⫹) group, iFOBT-negative group: iFOBT (⫺) group), and compared the characteristics of CS within two years after iFOBT between the both groups. Result: Of a total of 2274 examinees, 645 underwent CS within two years after iFOBT. Among them, 256 were in the iFOBT (⫹) group, while 399 were in the iFOBT (⫺) group. Significant differences were not admitted in the age and gender between the both groups. Of the 256 iFOBT (⫹) examinees, 47 showed advanced neoplasia (tubular adenoma ⭌10 mm, adenoma with villous histology, or high-grade dysplasia or invasive cancer) while 23 showed advanced neoplasia of the 399 iFOBT (⫺) examinees. The prevalence rate of advanced neoplasia was higher in iFOBT (⫹) group than that in the iFOBT (⫺) (24.2% vs. 7.27%: P⬍0.001). The number of advanced neoplasia was 62 in the iFOBT (⫹) group, while 29 in the iFOBT (⫺) group, respectively. The average tumor size (including adenoma⭌ 10mm) in iFOBT (⫹) group was significantly larger than that in the iFOBT (⫺) group (5.75⫾ 6.46 mm vs. 4.24⫾2.96 mm: P⬍0.001). The rate of proximal-sided advanced neoplasia showed no significant differences between the both groups (30.6% vs. 48.3%: P⬎0.05). As for invasion depth of CRC, all of FOBT (⫺) CRCs were Tis while 37.9% of the FOBT-positive CRCs were T1 or deeper (P⬎0.05). In the morphology of early colorectal carcinomas (Tis or T1), there were no significant differences between the both groups. Conclusion: As for screening of advanced neoplasia in the colorectum, iFOBT was an excellent examination. But the small tumors might be overlooked by iFOBT. Regardless of iFOBT, CS for asymptomatic examinees might enable us to detect colorectal tumors in a curable state with endoscopic the treatment.
Mo1576 The Efficiency of Colonic Capsule Endoscopy in Detection of Colorectal Polyps and Cancers Comparing to Colonoscopy: Multicenter, Prospective Crosses Over Study Stepan Suchanek*1, Michal Voska1, Ondrej Majek2, Gabriela Vojtechova1, Ilja Tacheci3, Marek Benes4,5, Pavel Drastich4,5, Tomáš Douda3, Jan Martinek1,4, Jan Bures3, Julius Spicak4, Miroslav Zavoral1 1 Department of Gastroenterology, 1st Faculty of Medicine, Charles University, Military University Hospital, Prague, Czech Republic; 2Institute of Biostatistics and Analyses, Masaryk University, Brno, Czech Republic; 3 Department of Gastroenterology, Faculty of Medicine, University Hospital, Hradec Kralove, Czech Republic; 4Department of Hepatogastroenterology, Institute for Clinical and Experimental Medicine, Prague, Czech Republic; 5 GEP Clinic, Prague, Czech Republic Background: Colon capsule endoscopy represents a noninvasive technology that
Volume 77, No. 5S : 2013
GASTROINTESTINAL ENDOSCOPY
AB433